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Cross-Site Scripting in lazysizes

High severity GitHub Reviewed Published Sep 3, 2020 to the GitHub Advisory Database • Updated Jan 9, 2023

Package

npm lazysizes (npm)

Affected versions

<= 5.2.1-rc0

Patched versions

5.2.1-rc1

Description

Versions of lazysizes prior to 5.2.1-rc1 are vulnerable to Cross-Site Scripting. The video-embed plugin fails to sanitize the following attributes: data-vimeo, data-vimeoparams, data-youtube and data-ytparams. This allows attackers to execute arbitrary JavaScript in a victim's browser if the attacker has control over the vulnerable attributes.

Recommendation

Upgrade to version 5.2.1-rc1 or later.

References

Reviewed Aug 31, 2020
Published to the GitHub Advisory Database Sep 3, 2020
Last updated Jan 9, 2023

Severity

High

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-w4vp-3mq7-7v82

Source code

No known source code
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